Pulpwood rosser



March 27, 1934. R. J. MacDoNALD PULPWOOD ROS SER Filed Sept. 29, 1932 2 Sheets-Sheet l Ahn;

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March 27, 1934. R J, MacDONALD 1,952,931

PULPWOOD ROS SER Filed Sept. 29, 1932 2 Sheets-Sheet 2 gg .es 26 2s dtvrwf/ Patented Mar. 27, 1934 UNITED s'mriez-sI PATENT? olii-icEl PULPWOOD ROSSER Robert James MacDonald, St. Stephen, New Brunswick, Canada, assignor of one-third to Edward J. CorrgangCalais; Mainev Application`v September 29, 1932, Serial No. 635,308

4'o1aims. (o1. 14m-20's) The invention relates to-improvements in pulp' wood rossers as described in the present specification and Vshown in'the accompanying drawings l'that form part of the same. 5v The object of the invention is to produce a highly eflicient and serviceable machine for rossing pulpwood; one in which pulpwood can be handled expeditiously by only one attendant, the controls being conveniently located forthis purl pose.

A- distinctive feature of the invention resides in thel special construction ofthe cutter` head whereby it automatically followsY the irregularities of the log surface so as to only remove the l--bark.V Other features of the invention will be apparentas the description of the machine is more fully recounted;

Referring to the accompanying drawings, Figrure l is a general front elevation of the'machin'e showing a log positioned therein. v l

Figure 2 is a left end View thereof.

Figure 3 is afragmentary" section of themachine frametaken on line 3-3 of' Figure 1' and illustrating the manner in which resilient pressureis applied on thelog to hold` it in place.

`Figure 4 isa detail of abracket and gearing by which an' upper set of rollers rotate in unisonwthj lower setsl of rollers.

Figure 5 isa verticalsection through'the brack-I et'shown in Figure 4. l v

Figure 6 is a horizontal section taken on the line 64-6 of Figure 7. Y

Figure 7 is right-hand end view'of Figure 1.

Figure 8 is a section takenon line 8--8A of'Fig`- ure-1.

Figure 9 is a detail of a'reverse gearing;

Figure lO'isa Vertical sectional view taken on the line 10-10 of Figure 2.

Figure 11 is a further vertical sectional view of Figure 2 but taken on line'11--11 thereof to depict thereverse gearing shown in .elevation in` Figure 9.

Like numerals of reference lindicate corresponding parts in each figure throughout the drawings of the machine.

In'the drawings the reference character A` de-4 notes a pulpwood log positioned inthe machine and occupying a horizontal disposition. The logl log while it is rossed and yet allows off its beingv turned tobring its entire periphery into contact with the'cutting tool as later detailed:` The rollers 5'have knurledifacesl` for-1 engaging the* work andl the` front set 12 of the lower rolls a're'xed upon a horizontal shaft 13 journalled in the standardsv 1'4", 14" of the frame, which frame'is of a suitable design to' accommodate the various operating parts. Y i o6 The rear set 15 Vof the lower rolls are" fixed upon a similar shaft 16 likewise journalled' in saidfstandards. The shafts 13 and 16 turn' in unisonv by means of the spur gears'l?, 17 attached to the rightha'nd ends thereof and meshed with the idlerI 18, best discernible in Figure 7. This idler may be" driven by a pulley on its shaft orin any other suitable manner' common t'o theart. The upper set of rolls 19', are fixed to a shaft 19 journalled in blocks 19 slidablydispo'sedn invertical guid'eways 20' of the frame'. Compres-` sion springs 21v are lodged in said guideways, one end of each spring being seated againstthe Arespective block and' the other end being seated against thefree'end of ari arm 23 of which there are aY pair. These" arms extend rearwardly and` are hinged tothe standards' at 24. Each arm has f a vertical rod 25 fitted ina holetherein andconnected with the shaft 19' so as to limit the movement `of the arms away from this shaft. AThejso" rods havelheads'22 to preclude their coming out of the openings in the arms. The headsare formed by bending over the upper endsof'the-rods soas to furnish enlargements. u

Extending transversely 0fA the arms is a shifter bar 26 loosely'ttedin slots 27 therein' and having its ends 28 bent at rightY angles and pivoted inlugs 29 integral'withthe standards, as illustrated in Fig; 7. Tneright-hand endy of thegshifter has'a lever 30`integral or securedther'eto and engageable with theteeth of a rack 31 integral'with or rigidly secured tothe standard 14 of the frame. Accordingly; this lever is manually shiftable to loweror raise the upper rolls. As the lever is raised the shifter bar elevates the arms on 95 their pivots which in turn pull up on the rods`25-and thus' raise the shaft 1`94upon which thel upper rolls arev carried. As the lever is' lowered the" springsv 21 force the shaft 19 down' y so `a's'to cause the upper rolls to engage the log A. 10U The lever engages the rack to retain these rollers in this position and the springs accommodate unevenness ofl the logs rotundity. Theupper set of rolls are gearedto the front lower set: in order to turn in unison therewith; 105.

This is achieved by a pair of miter gears 32; one ofk whichis made fast to a shaft 33 that bisects the upper shaft 19 and'is journalled in a bracket j' 34fswingable about the shaft 13 andA secured to1 thestandard 14 bya screw 35 in an arcuate slot 110 36 (see particularly Figures 4 and 5). This shaft has a keyway 37 running substantially its entire length and carries a sliding miter 38 keyed in this keyway and meshed with a similar gear 39 keyed to the shaft 19 of the upper rolls 19. A bearing 40 holds these gears in mesh and aids in supporting the shaft 33, which bearing is slidably disposed in the bracket 34 by means of the slot 41. By this arrangement the gearing turns the upper rolls in unison with the lower rolls; and whereas these rolls are not shown as power operated, it is understood that they may be so operated by connection with the power take oif. This obviously does not require invention. It may be here remarked that if so desired some form of table as'at 44 may be employed in front of the rolls to sustain logs before or after rossing.

The cutter head 45 is disposed to the rear of the log holding mechanism and comprises a car- ,riage 46 slidably mounted upon a shaft 47 having a continuous keyway 48 therein and journalled in bearings 49 Aof 'the frame. This shaft is driven from the main drive shaft 50 by a suitable connection such as the pulleys and belt 5l. The car- LIUriage is slidably mounted upon a guideway 52 borne by the frame, and is threadedly engaged with a feed screw 53 extending parallel to the shaft 47 journalled in said bearings 49 and provided with a large friction wheel 54..

frame 55 Vhaving members straddling the carriage and freely mounted on the shaft 47 so as to slide therealong with the carriage, but also Abeing capable of swinging to and away from sthe work.Y The upper end of this swinging frame has a stub shaft 56 journalled therein and xed to the cutter head 45 that carries the cutting knife or knives 57. The shaft preferably has a pulley at each end over which belts 58 are trained Tso as to form a driving connection with pulleys 59`mounted upon the shaft 47 and keyed in the keyway 48 so as to slide along this shaft.

It will be understood that when the feed screw 53 is rotated bythe friction wheel 54 the carriage l'.'Jis fed along the guideway 52 according to the directionA in which the screw is turned. The rotation of the shaft 47 drives the cutter head so that the knife element may ross the log when brought into contact therewith, the cutter trav` L. .ersing the log by means of the feed screw.

`To shift the cutter head in and out of engagement with the work a substantially U-shaped rod 60 has its crosspiece 61 loosely fitted in a loop 62 integral with the swinging frame 55 and )its ends pivoted in the standards. vOne of these ends however is extended below the pivot and connected by a bar 63 to a hand lever 64 by which the frame is controlled. To accommodate unevenne'ss in the log sur- -:face, one of the bearings, as at 65, of the stub shaft 56 is in the form of a block 66, Figure 6, tted in a guideway 67 integral with the frame 55 and urged into normal position by a spring 68. 'The other bearing 69 is also in block form ibut merely rocks in the swinging frame 55. This bearing block has a truncated spherical surface which enables it to have universal angular movement in the frame so as to permit the shaft 56 7o to have angular movement with respect to the Ywork.

The main driving shaft 50 has a pulley 70 for taking off power from a suitable source, and is journalled in bearings 7lV and 72. The bearing v72 remote from the pulley has a slot 73 for its jour- Forming ya part of the carriage -is a swinging Y nal whereby the shaft is free to shift to and away from the large friction wheel 54; which shaft has a small friction wheel 74. Below this main shaft is a countershaft 75 likewise journalled in the bearings 7l and 72, the latter being also slotted. The countershaft 75 is supplied with a gear 76 inniesh with a gear 77 on the main shaft in order to be driven in the opposite direction. This shaft carries a small friction wheel 78. A shifter 79 is attached to the main shaft and the countershaft adjacent to the slotted bearings. This shifter is connected by link mechanism 8i) to a hand lever 81 which upon being shifted in one direction presses downwardly on. the shifter member 82 throwing the countershaft to the rear of its slot and the main shaft toward the front of its slot so as to engage the friction wheel 74 with the wheel 54. Both the main shaft and the countershaft are loosely disposed in their respective slots and are free to move lengthwise thereof. The shafts are a running fit in the shifter 79 which forms a connection between them. Since the link mechanism is pivotally connected at right angies to the shifter member 82 and at a point removed from the shifter it must apply a turning force von the shifter tending to shift one shaft toward the friction wheel 54 and the other away from it. Consequently a downward force on the member 82'must throw the main shaft toward the friction wheel 54 so as to engage it and at the same time the other shaft is thrown in the opposite direction and is limited by the end of the slot, which serves as a fulcrum. Upon shifting this leverV in the opposite Vdirection the main shaft is thrown back and the countershaft forward toengage the wheel 78 Vwith the wheel 54. This reverses the feed of Vthe screw so as to change rthe direction of movement of the cutter as it comes to the 'end of the log. The friction wheels 74, 78 are normally held freevof the wheel 54 by the spring k83.

1. A pulpwood rosser comprising a frame, a power operated cutter mechanism borne thereby and adapted to be shifted to and away from a log, mechanism for horizontally supporting and rotating a log in the frame, said mechanism consisting of a horizontal shaft mounted for vertical movement, compression springs for applying pressure upon the shaft,`arms pivoted to the frame and engaged at their free ends with said springs, rods connected with the shaft and slidably tted in the arms to limit their movement away from the shaft, a lever-operated structure for elevating the arms in unison, and'means for securing said lever-operated structure in position.

2. A pulpwood rosser comprising a frame, a power operated cutter mechanism borne thereby and adapted to be shifted to and away from a log, mechanism for horizontally supporting and rotating a log in `the frame, said mechanism consisting of rolls resiliently urged into engagement with the log, arms pivoted in the frame and connected to the rolls, slots therein, a substantially U-shaped shifter having its ends pivoted in the frame and its crosspiece engaged in said slots, a hand lever connected to one of said shifter ends for actuating the shifter, and a rack for securing the lever against movement in one direction.

3. A pulpwood rosser comprising a frame, a power operated cutter mechanism borne thereby and adapted to be shifted to and away from a log, horizontal shafts journalled in the frame at least one ofwhich is driven by a source of power, rolls aixecl thereto for holding a log, one of said shafts being guided in the frame for movement to and away from the other shafts, mechanism connecting this shaft with one of the non-shiftable shafts to operate the rolls thereof in unison, said mechanism consisting of a bracket swingable about the non-shiftable shaft, a pair of meshing miter gears therein, one of which is xed to the nonshiitable shaft, a stub shaft journalled in the bracket and xed to the other miter gear, said shaft having a lengthwise keyway, a miter gear xed to the movable shaft, a similar gear slidably keyed to the stub shaft, and a bearing supporting the stub shaft for controlling the movement of the slidable miter gear therealong.

4. A pulpwood rosser comprising a frame, roller mechanism for holding and rotating a log therein, a power operated rossing mechanism embracing a carriage adapted to be fed lengthwise of a log, a swinging frame journalled for swinging movement to and away from the log and shiftable therealong by means of the carriage, a stub shaft journalled in a pair of bearings in the frame, one of said bearings being composed of a block fitted in a guideway and resilientiy urged into normal position by a spring, and the other bearing being composed of a bearing having a spherical surface by which it rocks in the frame to accommodate itself to the movement of its companion.

ROBERT JAMES MACDONALD. 

